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<FONT color="green">001</FONT>    /*<a name="line.1"></a>
<FONT color="green">002</FONT>     * Copyright (C) 2008-2012, fluid Operations AG<a name="line.2"></a>
<FONT color="green">003</FONT>     *<a name="line.3"></a>
<FONT color="green">004</FONT>     * FedX is free software: you can redistribute it and/or modify<a name="line.4"></a>
<FONT color="green">005</FONT>     * it under the terms of the GNU Affero General Public License as<a name="line.5"></a>
<FONT color="green">006</FONT>     * published by the Free Software Foundation, either version 3 of the<a name="line.6"></a>
<FONT color="green">007</FONT>     * License, or (at your option) any later version.<a name="line.7"></a>
<FONT color="green">008</FONT>     * <a name="line.8"></a>
<FONT color="green">009</FONT>     * This program is distributed in the hope that it will be useful,<a name="line.9"></a>
<FONT color="green">010</FONT>     * but WITHOUT ANY WARRANTY; without even the implied warranty of<a name="line.10"></a>
<FONT color="green">011</FONT>     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the<a name="line.11"></a>
<FONT color="green">012</FONT>     * GNU Affero General Public License for more details.<a name="line.12"></a>
<FONT color="green">013</FONT>     * <a name="line.13"></a>
<FONT color="green">014</FONT>     * You should have received a copy of the GNU Affero General Public License<a name="line.14"></a>
<FONT color="green">015</FONT>     * along with this program.  If not, see &lt;http://www.gnu.org/licenses/&gt;.<a name="line.15"></a>
<FONT color="green">016</FONT>     */<a name="line.16"></a>
<FONT color="green">017</FONT>    <a name="line.17"></a>
<FONT color="green">018</FONT>    package com.fluidops.fedx.util;<a name="line.18"></a>
<FONT color="green">019</FONT>    <a name="line.19"></a>
<FONT color="green">020</FONT>    import java.util.HashSet;<a name="line.20"></a>
<FONT color="green">021</FONT>    import java.util.List;<a name="line.21"></a>
<FONT color="green">022</FONT>    import java.util.Set;<a name="line.22"></a>
<FONT color="green">023</FONT>    <a name="line.23"></a>
<FONT color="green">024</FONT>    import org.apache.log4j.Logger;<a name="line.24"></a>
<FONT color="green">025</FONT>    import org.openrdf.model.Resource;<a name="line.25"></a>
<FONT color="green">026</FONT>    import org.openrdf.model.Statement;<a name="line.26"></a>
<FONT color="green">027</FONT>    import org.openrdf.model.URI;<a name="line.27"></a>
<FONT color="green">028</FONT>    import org.openrdf.model.Value;<a name="line.28"></a>
<FONT color="green">029</FONT>    import org.openrdf.model.impl.StatementImpl;<a name="line.29"></a>
<FONT color="green">030</FONT>    import org.openrdf.query.BindingSet;<a name="line.30"></a>
<FONT color="green">031</FONT>    import org.openrdf.query.algebra.Compare;<a name="line.31"></a>
<FONT color="green">032</FONT>    import org.openrdf.query.algebra.Filter;<a name="line.32"></a>
<FONT color="green">033</FONT>    import org.openrdf.query.algebra.Join;<a name="line.33"></a>
<FONT color="green">034</FONT>    import org.openrdf.query.algebra.Projection;<a name="line.34"></a>
<FONT color="green">035</FONT>    import org.openrdf.query.algebra.ProjectionElem;<a name="line.35"></a>
<FONT color="green">036</FONT>    import org.openrdf.query.algebra.ProjectionElemList;<a name="line.36"></a>
<FONT color="green">037</FONT>    import org.openrdf.query.algebra.StatementPattern;<a name="line.37"></a>
<FONT color="green">038</FONT>    import org.openrdf.query.algebra.TupleExpr;<a name="line.38"></a>
<FONT color="green">039</FONT>    import org.openrdf.query.algebra.Union;<a name="line.39"></a>
<FONT color="green">040</FONT>    import org.openrdf.query.algebra.ValueConstant;<a name="line.40"></a>
<FONT color="green">041</FONT>    import org.openrdf.query.algebra.Var;<a name="line.41"></a>
<FONT color="green">042</FONT>    import org.openrdf.query.algebra.Compare.CompareOp;<a name="line.42"></a>
<FONT color="green">043</FONT>    import org.openrdf.query.impl.EmptyBindingSet;<a name="line.43"></a>
<FONT color="green">044</FONT>    <a name="line.44"></a>
<FONT color="green">045</FONT>    import com.fluidops.fedx.algebra.FilterValueExpr;<a name="line.45"></a>
<FONT color="green">046</FONT>    import com.fluidops.fedx.algebra.IndependentJoinGroup;<a name="line.46"></a>
<FONT color="green">047</FONT>    import com.fluidops.fedx.algebra.ExclusiveStatement;<a name="line.47"></a>
<FONT color="green">048</FONT>    import com.fluidops.fedx.algebra.ExclusiveGroup;<a name="line.48"></a>
<FONT color="green">049</FONT>    import com.fluidops.fedx.exception.FilterConversionException;<a name="line.49"></a>
<FONT color="green">050</FONT>    import com.fluidops.fedx.exception.IllegalQueryException;<a name="line.50"></a>
<FONT color="green">051</FONT>    <a name="line.51"></a>
<FONT color="green">052</FONT>    /**<a name="line.52"></a>
<FONT color="green">053</FONT>     * Various static functions for query handling and parsing (alegbra expression).<a name="line.53"></a>
<FONT color="green">054</FONT>     * <a name="line.54"></a>
<FONT color="green">055</FONT>     * @author Andreas Schwarte<a name="line.55"></a>
<FONT color="green">056</FONT>     */<a name="line.56"></a>
<FONT color="green">057</FONT>    public class QueryAlgebraUtil {<a name="line.57"></a>
<FONT color="green">058</FONT>    <a name="line.58"></a>
<FONT color="green">059</FONT>            public static Logger log = Logger.getLogger(QueryAlgebraUtil.class);<a name="line.59"></a>
<FONT color="green">060</FONT>            <a name="line.60"></a>
<FONT color="green">061</FONT>            /**<a name="line.61"></a>
<FONT color="green">062</FONT>             * returns true iff there is at least one free variable, i.e. there is no binding<a name="line.62"></a>
<FONT color="green">063</FONT>             * for any variable<a name="line.63"></a>
<FONT color="green">064</FONT>             * <a name="line.64"></a>
<FONT color="green">065</FONT>             * @param stmt<a name="line.65"></a>
<FONT color="green">066</FONT>             * @param bindings<a name="line.66"></a>
<FONT color="green">067</FONT>             * @return<a name="line.67"></a>
<FONT color="green">068</FONT>             */<a name="line.68"></a>
<FONT color="green">069</FONT>            public static boolean hasFreeVars(StatementPattern stmt, BindingSet bindings) {<a name="line.69"></a>
<FONT color="green">070</FONT>                    for (Var var : stmt.getVarList()) {<a name="line.70"></a>
<FONT color="green">071</FONT>                            if(!var.hasValue() &amp;&amp; !bindings.hasBinding(var.getName()))<a name="line.71"></a>
<FONT color="green">072</FONT>                                    return true;    // there is at least one free var                               <a name="line.72"></a>
<FONT color="green">073</FONT>                    }<a name="line.73"></a>
<FONT color="green">074</FONT>                    return false;<a name="line.74"></a>
<FONT color="green">075</FONT>            }<a name="line.75"></a>
<FONT color="green">076</FONT>            <a name="line.76"></a>
<FONT color="green">077</FONT>            /**<a name="line.77"></a>
<FONT color="green">078</FONT>             * Return the {@link Value} of the variable which is either taken from<a name="line.78"></a>
<FONT color="green">079</FONT>             * the variable itself (bound) or from the bindingsset (unbound).<a name="line.79"></a>
<FONT color="green">080</FONT>             * <a name="line.80"></a>
<FONT color="green">081</FONT>             * @param var<a name="line.81"></a>
<FONT color="green">082</FONT>             * @param bindings<a name="line.82"></a>
<FONT color="green">083</FONT>             *                      the bindings, must not be null, use {@link EmptyBindingSet} instead<a name="line.83"></a>
<FONT color="green">084</FONT>             * <a name="line.84"></a>
<FONT color="green">085</FONT>             * @return<a name="line.85"></a>
<FONT color="green">086</FONT>             *              the value or null<a name="line.86"></a>
<FONT color="green">087</FONT>             */<a name="line.87"></a>
<FONT color="green">088</FONT>            public static Value getVarValue(Var var, BindingSet bindings) {<a name="line.88"></a>
<FONT color="green">089</FONT>                    if (var == null) {<a name="line.89"></a>
<FONT color="green">090</FONT>                            return null;<a name="line.90"></a>
<FONT color="green">091</FONT>                    } else if (var.hasValue()) {<a name="line.91"></a>
<FONT color="green">092</FONT>                            return var.getValue();<a name="line.92"></a>
<FONT color="green">093</FONT>                    } else {<a name="line.93"></a>
<FONT color="green">094</FONT>                            return bindings.getValue(var.getName());<a name="line.94"></a>
<FONT color="green">095</FONT>                    }<a name="line.95"></a>
<FONT color="green">096</FONT>            }<a name="line.96"></a>
<FONT color="green">097</FONT>                    <a name="line.97"></a>
<FONT color="green">098</FONT>            <a name="line.98"></a>
<FONT color="green">099</FONT>            public static StatementPattern toStatementPattern(Statement stmt) {<a name="line.99"></a>
<FONT color="green">100</FONT>                    return toStatementPattern(stmt.getSubject(), stmt.getPredicate(), stmt.getObject());<a name="line.100"></a>
<FONT color="green">101</FONT>            }<a name="line.101"></a>
<FONT color="green">102</FONT>            <a name="line.102"></a>
<FONT color="green">103</FONT>            public static StatementPattern toStatementPattern(Resource subj, URI pred, Value obj) {<a name="line.103"></a>
<FONT color="green">104</FONT>                    Var s = subj==null ? new Var("s") : new Var("const_s", subj);<a name="line.104"></a>
<FONT color="green">105</FONT>                    Var p = pred==null ? new Var("p") : new Var("const_p", pred);<a name="line.105"></a>
<FONT color="green">106</FONT>                    Var o = obj==null ? new Var("o") : new Var("const_o", obj);<a name="line.106"></a>
<FONT color="green">107</FONT>                    // TODO context<a name="line.107"></a>
<FONT color="green">108</FONT>                    <a name="line.108"></a>
<FONT color="green">109</FONT>                    return new StatementPattern(s, p, o);<a name="line.109"></a>
<FONT color="green">110</FONT>            }<a name="line.110"></a>
<FONT color="green">111</FONT>            <a name="line.111"></a>
<FONT color="green">112</FONT>            public static Statement toStatement(StatementPattern stmt) {<a name="line.112"></a>
<FONT color="green">113</FONT>                    return toStatement(stmt, EmptyBindingSet.getInstance());<a name="line.113"></a>
<FONT color="green">114</FONT>            }<a name="line.114"></a>
<FONT color="green">115</FONT>            <a name="line.115"></a>
<FONT color="green">116</FONT>            public static Statement toStatement(StatementPattern stmt, BindingSet bindings) {<a name="line.116"></a>
<FONT color="green">117</FONT>                    <a name="line.117"></a>
<FONT color="green">118</FONT>                    Value subj = getVarValue(stmt.getSubjectVar(), bindings);<a name="line.118"></a>
<FONT color="green">119</FONT>                    Value pred = getVarValue(stmt.getPredicateVar(), bindings);<a name="line.119"></a>
<FONT color="green">120</FONT>                    Value obj = getVarValue(stmt.getObjectVar(), bindings);<a name="line.120"></a>
<FONT color="green">121</FONT>                    // TODO context<a name="line.121"></a>
<FONT color="green">122</FONT>                    <a name="line.122"></a>
<FONT color="green">123</FONT>                    return new StatementImpl((Resource)subj, (URI)pred, obj);<a name="line.123"></a>
<FONT color="green">124</FONT>            }<a name="line.124"></a>
<FONT color="green">125</FONT>            <a name="line.125"></a>
<FONT color="green">126</FONT>            <a name="line.126"></a>
<FONT color="green">127</FONT>            /**<a name="line.127"></a>
<FONT color="green">128</FONT>             * Construct a SELECT query for the provided statement. <a name="line.128"></a>
<FONT color="green">129</FONT>             * <a name="line.129"></a>
<FONT color="green">130</FONT>             * @param stmt<a name="line.130"></a>
<FONT color="green">131</FONT>             * @param bindings<a name="line.131"></a>
<FONT color="green">132</FONT>             * @param filterExpr<a name="line.132"></a>
<FONT color="green">133</FONT>             * @param evaluated<a name="line.133"></a>
<FONT color="green">134</FONT>             *                      parameter can be used outside this method to check whether FILTER has been evaluated, false in beginning<a name="line.134"></a>
<FONT color="green">135</FONT>             * <a name="line.135"></a>
<FONT color="green">136</FONT>             * @return<a name="line.136"></a>
<FONT color="green">137</FONT>             * @throws IllegalQueryException<a name="line.137"></a>
<FONT color="green">138</FONT>             */<a name="line.138"></a>
<FONT color="green">139</FONT>            public static TupleExpr selectQuery( StatementPattern stmt, BindingSet bindings, FilterValueExpr filterExpr, Boolean evaluated) throws IllegalQueryException {<a name="line.139"></a>
<FONT color="green">140</FONT>                    <a name="line.140"></a>
<FONT color="green">141</FONT>                    Set&lt;String&gt; varNames = new HashSet&lt;String&gt;();<a name="line.141"></a>
<FONT color="green">142</FONT>                    TupleExpr expr = constructStatement(stmt, varNames, bindings);<a name="line.142"></a>
<FONT color="green">143</FONT>                                    <a name="line.143"></a>
<FONT color="green">144</FONT>                    if (varNames.size()==0)<a name="line.144"></a>
<FONT color="green">145</FONT>                            throw new IllegalQueryException("SELECT query needs at least one projection!");<a name="line.145"></a>
<FONT color="green">146</FONT>                                    <a name="line.146"></a>
<FONT color="green">147</FONT>                    if (filterExpr!=null) {<a name="line.147"></a>
<FONT color="green">148</FONT>                            try {<a name="line.148"></a>
<FONT color="green">149</FONT>                                    expr = new Filter(expr, FilterUtils.toFilter(filterExpr));<a name="line.149"></a>
<FONT color="green">150</FONT>                                    evaluated = true;<a name="line.150"></a>
<FONT color="green">151</FONT>                            } catch (FilterConversionException e) {<a name="line.151"></a>
<FONT color="green">152</FONT>                                    log.warn("Filter could not be evaluated remotely. " + e.getMessage());<a name="line.152"></a>
<FONT color="green">153</FONT>                            }<a name="line.153"></a>
<FONT color="green">154</FONT>                    }<a name="line.154"></a>
<FONT color="green">155</FONT>            <a name="line.155"></a>
<FONT color="green">156</FONT>                    ProjectionElemList projList = new ProjectionElemList();<a name="line.156"></a>
<FONT color="green">157</FONT>                    for (String var : varNames)<a name="line.157"></a>
<FONT color="green">158</FONT>                            projList.addElement( new ProjectionElem(var));<a name="line.158"></a>
<FONT color="green">159</FONT>                    <a name="line.159"></a>
<FONT color="green">160</FONT>                    Projection proj = new Projection(expr, projList);<a name="line.160"></a>
<FONT color="green">161</FONT>                    <a name="line.161"></a>
<FONT color="green">162</FONT>                    return proj;    <a name="line.162"></a>
<FONT color="green">163</FONT>            }<a name="line.163"></a>
<FONT color="green">164</FONT>            <a name="line.164"></a>
<FONT color="green">165</FONT>            /**<a name="line.165"></a>
<FONT color="green">166</FONT>             * Construct a SELECT query for the provided {@link ExclusiveGroup}. Note that bindings<a name="line.166"></a>
<FONT color="green">167</FONT>             * and filterExpr are applied whenever possible.<a name="line.167"></a>
<FONT color="green">168</FONT>             *  <a name="line.168"></a>
<FONT color="green">169</FONT>             * @param group<a name="line.169"></a>
<FONT color="green">170</FONT>             *                              the expression for the query<a name="line.170"></a>
<FONT color="green">171</FONT>             * @param bindings<a name="line.171"></a>
<FONT color="green">172</FONT>             *                              the bindings to be applied<a name="line.172"></a>
<FONT color="green">173</FONT>             * @param filterExpr<a name="line.173"></a>
<FONT color="green">174</FONT>             *                              a filter expression or null<a name="line.174"></a>
<FONT color="green">175</FONT>             * @param evaluated<a name="line.175"></a>
<FONT color="green">176</FONT>             *                              parameter can be used outside this method to check whether FILTER has been evaluated, false in beginning<a name="line.176"></a>
<FONT color="green">177</FONT>             * <a name="line.177"></a>
<FONT color="green">178</FONT>             * @return<a name="line.178"></a>
<FONT color="green">179</FONT>             */<a name="line.179"></a>
<FONT color="green">180</FONT>            public static TupleExpr selectQuery( ExclusiveGroup group, BindingSet bindings, FilterValueExpr filterExpr, Boolean evaluated) {<a name="line.180"></a>
<FONT color="green">181</FONT>                    <a name="line.181"></a>
<FONT color="green">182</FONT>                    <a name="line.182"></a>
<FONT color="green">183</FONT>                    Set&lt;String&gt; varNames = new HashSet&lt;String&gt;();<a name="line.183"></a>
<FONT color="green">184</FONT>                    List&lt;ExclusiveStatement&gt; stmts = group.getStatements();<a name="line.184"></a>
<FONT color="green">185</FONT>                    <a name="line.185"></a>
<FONT color="green">186</FONT>                    Join join = null;<a name="line.186"></a>
<FONT color="green">187</FONT>                    <a name="line.187"></a>
<FONT color="green">188</FONT>                    if (stmts.size()==2) {<a name="line.188"></a>
<FONT color="green">189</FONT>                            join = new Join(constructStatement(stmts.get(0), varNames, bindings), constructStatement(stmts.get(1), varNames, bindings));<a name="line.189"></a>
<FONT color="green">190</FONT>                    } else {<a name="line.190"></a>
<FONT color="green">191</FONT>                            join = new Join();<a name="line.191"></a>
<FONT color="green">192</FONT>                            join.setLeftArg(constructStatement(stmts.get(0), varNames, bindings) );<a name="line.192"></a>
<FONT color="green">193</FONT>                            Join tmp = join;<a name="line.193"></a>
<FONT color="green">194</FONT>                            int idx;<a name="line.194"></a>
<FONT color="green">195</FONT>                            for (idx=1; idx&lt;stmts.size()-1; idx++) {<a name="line.195"></a>
<FONT color="green">196</FONT>                                    Join _u = new Join();<a name="line.196"></a>
<FONT color="green">197</FONT>                                    _u.setLeftArg( constructStatement(stmts.get(idx), varNames, bindings) );<a name="line.197"></a>
<FONT color="green">198</FONT>                                    tmp.setRightArg(_u);<a name="line.198"></a>
<FONT color="green">199</FONT>                                    tmp = _u;<a name="line.199"></a>
<FONT color="green">200</FONT>                            }<a name="line.200"></a>
<FONT color="green">201</FONT>                            tmp.setRightArg( constructStatement(stmts.get(idx), varNames, bindings) );<a name="line.201"></a>
<FONT color="green">202</FONT>                    }       <a name="line.202"></a>
<FONT color="green">203</FONT>                    <a name="line.203"></a>
<FONT color="green">204</FONT>                    TupleExpr expr = join;<a name="line.204"></a>
<FONT color="green">205</FONT>                                    <a name="line.205"></a>
<FONT color="green">206</FONT>                    if (filterExpr!=null) {<a name="line.206"></a>
<FONT color="green">207</FONT>                            try {<a name="line.207"></a>
<FONT color="green">208</FONT>                                    expr = new Filter(expr, FilterUtils.toFilter(filterExpr));<a name="line.208"></a>
<FONT color="green">209</FONT>                                    evaluated = true;<a name="line.209"></a>
<FONT color="green">210</FONT>                            } catch (FilterConversionException e) {<a name="line.210"></a>
<FONT color="green">211</FONT>                                    log.warn("Filter could not be evaluated remotely. " + e.getMessage());<a name="line.211"></a>
<FONT color="green">212</FONT>                            }<a name="line.212"></a>
<FONT color="green">213</FONT>                    }<a name="line.213"></a>
<FONT color="green">214</FONT>                    <a name="line.214"></a>
<FONT color="green">215</FONT>                    ProjectionElemList projList = new ProjectionElemList();<a name="line.215"></a>
<FONT color="green">216</FONT>                    for (String var : varNames)<a name="line.216"></a>
<FONT color="green">217</FONT>                            projList.addElement( new ProjectionElem(var));<a name="line.217"></a>
<FONT color="green">218</FONT>                    <a name="line.218"></a>
<FONT color="green">219</FONT>                    Projection proj = new Projection(expr, projList);<a name="line.219"></a>
<FONT color="green">220</FONT>                    <a name="line.220"></a>
<FONT color="green">221</FONT>                    return proj;<a name="line.221"></a>
<FONT color="green">222</FONT>            }<a name="line.222"></a>
<FONT color="green">223</FONT>    <a name="line.223"></a>
<FONT color="green">224</FONT>            /**<a name="line.224"></a>
<FONT color="green">225</FONT>             * Construct a SELECT query expression for a bound union.<a name="line.225"></a>
<FONT color="green">226</FONT>             * <a name="line.226"></a>
<FONT color="green">227</FONT>             * Pattern:<a name="line.227"></a>
<FONT color="green">228</FONT>             * <a name="line.228"></a>
<FONT color="green">229</FONT>             * SELECT ?v_1 ?v_2 ?v_N WHERE { { ?v_1 p o } UNION { ?v_2 p o } UNION ... } <a name="line.229"></a>
<FONT color="green">230</FONT>             * <a name="line.230"></a>
<FONT color="green">231</FONT>             * Note that the filterExpr is not evaluated at the moment.<a name="line.231"></a>
<FONT color="green">232</FONT>             * <a name="line.232"></a>
<FONT color="green">233</FONT>             * @param stmt<a name="line.233"></a>
<FONT color="green">234</FONT>             * @param unionBindings<a name="line.234"></a>
<FONT color="green">235</FONT>             * @param filterExpr<a name="line.235"></a>
<FONT color="green">236</FONT>             * @param evaluated<a name="line.236"></a>
<FONT color="green">237</FONT>             *                      parameter can be used outside this method to check whether FILTER has been evaluated, false in beginning<a name="line.237"></a>
<FONT color="green">238</FONT>             * <a name="line.238"></a>
<FONT color="green">239</FONT>             * @return<a name="line.239"></a>
<FONT color="green">240</FONT>             */<a name="line.240"></a>
<FONT color="green">241</FONT>            public static TupleExpr selectQueryBoundUnion( StatementPattern stmt, List&lt;BindingSet&gt; unionBindings, FilterValueExpr filterExpr, Boolean evaluated) {<a name="line.241"></a>
<FONT color="green">242</FONT>                    <a name="line.242"></a>
<FONT color="green">243</FONT>                    // TODO add FILTER expressions<a name="line.243"></a>
<FONT color="green">244</FONT>                    <a name="line.244"></a>
<FONT color="green">245</FONT>                    Set&lt;String&gt; varNames = new HashSet&lt;String&gt;();<a name="line.245"></a>
<FONT color="green">246</FONT>                    <a name="line.246"></a>
<FONT color="green">247</FONT>                    Union union = new Union();<a name="line.247"></a>
<FONT color="green">248</FONT>                    union.setLeftArg(constructStatementId(stmt, Integer.toString(0), varNames, unionBindings.get(0)) );<a name="line.248"></a>
<FONT color="green">249</FONT>                    Union tmp = union;<a name="line.249"></a>
<FONT color="green">250</FONT>                    int idx;<a name="line.250"></a>
<FONT color="green">251</FONT>                    for (idx=1; idx&lt;unionBindings.size()-1; idx++) {<a name="line.251"></a>
<FONT color="green">252</FONT>                            Union _u = new Union();<a name="line.252"></a>
<FONT color="green">253</FONT>                            _u.setLeftArg( constructStatementId(stmt, Integer.toString(idx), varNames, unionBindings.get(idx)) );<a name="line.253"></a>
<FONT color="green">254</FONT>                            tmp.setRightArg(_u);<a name="line.254"></a>
<FONT color="green">255</FONT>                            tmp = _u;<a name="line.255"></a>
<FONT color="green">256</FONT>                    }<a name="line.256"></a>
<FONT color="green">257</FONT>                    tmp.setRightArg( constructStatementId(stmt, Integer.toString(idx), varNames, unionBindings.get(idx) ));<a name="line.257"></a>
<FONT color="green">258</FONT>                                    <a name="line.258"></a>
<FONT color="green">259</FONT>                    ProjectionElemList projList = new ProjectionElemList();<a name="line.259"></a>
<FONT color="green">260</FONT>                    for (String var : varNames)<a name="line.260"></a>
<FONT color="green">261</FONT>                            projList.addElement( new ProjectionElem(var));<a name="line.261"></a>
<FONT color="green">262</FONT>                    <a name="line.262"></a>
<FONT color="green">263</FONT>                    Projection proj = new Projection(union, projList);<a name="line.263"></a>
<FONT color="green">264</FONT>    <a name="line.264"></a>
<FONT color="green">265</FONT>                    return proj;<a name="line.265"></a>
<FONT color="green">266</FONT>            }       <a name="line.266"></a>
<FONT color="green">267</FONT>                    <a name="line.267"></a>
<FONT color="green">268</FONT>            <a name="line.268"></a>
<FONT color="green">269</FONT>            /**<a name="line.269"></a>
<FONT color="green">270</FONT>             * Construct a SELECT query for a grouped bound check.<a name="line.270"></a>
<FONT color="green">271</FONT>             * <a name="line.271"></a>
<FONT color="green">272</FONT>             * Pattern:<a name="line.272"></a>
<FONT color="green">273</FONT>             * <a name="line.273"></a>
<FONT color="green">274</FONT>             * SELECT DISTINCT ?o_1 .. ?o_N WHERE { { s1 p1 ?o_1 FILTER ?o_1=o1 } UNION ... UNION { sN pN ?o_N FILTER ?o_N=oN }}<a name="line.274"></a>
<FONT color="green">275</FONT>             * <a name="line.275"></a>
<FONT color="green">276</FONT>             * @param stmt<a name="line.276"></a>
<FONT color="green">277</FONT>             * @param unionBindings<a name="line.277"></a>
<FONT color="green">278</FONT>             * @return<a name="line.278"></a>
<FONT color="green">279</FONT>             */<a name="line.279"></a>
<FONT color="green">280</FONT>            public static TupleExpr selectQueryStringBoundCheck(StatementPattern stmt, List&lt;BindingSet&gt; unionBindings) {<a name="line.280"></a>
<FONT color="green">281</FONT>                    <a name="line.281"></a>
<FONT color="green">282</FONT>                    Set&lt;String&gt; varNames = new HashSet&lt;String&gt;();<a name="line.282"></a>
<FONT color="green">283</FONT>                    <a name="line.283"></a>
<FONT color="green">284</FONT>                    Union union = new Union();<a name="line.284"></a>
<FONT color="green">285</FONT>                    union.setLeftArg(constructStatementCheckId(stmt, 0, varNames, unionBindings.get(0)) );<a name="line.285"></a>
<FONT color="green">286</FONT>                    Union tmp = union;<a name="line.286"></a>
<FONT color="green">287</FONT>                    int idx;<a name="line.287"></a>
<FONT color="green">288</FONT>                    for (idx=1; idx&lt;unionBindings.size()-1; idx++) {<a name="line.288"></a>
<FONT color="green">289</FONT>                            Union _u = new Union();<a name="line.289"></a>
<FONT color="green">290</FONT>                            _u.setLeftArg( constructStatementCheckId(stmt, idx, varNames, unionBindings.get(idx)) );<a name="line.290"></a>
<FONT color="green">291</FONT>                            tmp.setRightArg(_u);<a name="line.291"></a>
<FONT color="green">292</FONT>                            tmp = _u;<a name="line.292"></a>
<FONT color="green">293</FONT>                    }<a name="line.293"></a>
<FONT color="green">294</FONT>                    tmp.setRightArg( constructStatementCheckId(stmt, idx, varNames, unionBindings.get(idx) ));<a name="line.294"></a>
<FONT color="green">295</FONT>                    <a name="line.295"></a>
<FONT color="green">296</FONT>                    ProjectionElemList projList = new ProjectionElemList();<a name="line.296"></a>
<FONT color="green">297</FONT>                    for (String var : varNames)<a name="line.297"></a>
<FONT color="green">298</FONT>                            projList.addElement( new ProjectionElem(var));<a name="line.298"></a>
<FONT color="green">299</FONT>                    <a name="line.299"></a>
<FONT color="green">300</FONT>                    Projection proj = new Projection(union, projList);<a name="line.300"></a>
<FONT color="green">301</FONT>    <a name="line.301"></a>
<FONT color="green">302</FONT>                    return proj;<a name="line.302"></a>
<FONT color="green">303</FONT>            }       <a name="line.303"></a>
<FONT color="green">304</FONT>            <a name="line.304"></a>
<FONT color="green">305</FONT>            <a name="line.305"></a>
<FONT color="green">306</FONT>            public static TupleExpr selectQueryIndependentJoinGroup(IndependentJoinGroup joinGroup, BindingSet bindings) {<a name="line.306"></a>
<FONT color="green">307</FONT>                    <a name="line.307"></a>
<FONT color="green">308</FONT>                    Set&lt;String&gt; varNames = new HashSet&lt;String&gt;();<a name="line.308"></a>
<FONT color="green">309</FONT>                    <a name="line.309"></a>
<FONT color="green">310</FONT>                    <a name="line.310"></a>
<FONT color="green">311</FONT>                    Union union = null;<a name="line.311"></a>
<FONT color="green">312</FONT>                    <a name="line.312"></a>
<FONT color="green">313</FONT>                    if (joinGroup.getMemberCount()==2) {<a name="line.313"></a>
<FONT color="green">314</FONT>                            union = new Union();<a name="line.314"></a>
<FONT color="green">315</FONT>                            union.setLeftArg(constructStatementId((StatementPattern)joinGroup.getMembers().get(0), Integer.toString(0), varNames, bindings));<a name="line.315"></a>
<FONT color="green">316</FONT>                            union.setRightArg(constructStatementId((StatementPattern)joinGroup.getMembers().get(1), Integer.toString(1), varNames, bindings));<a name="line.316"></a>
<FONT color="green">317</FONT>                    } else {<a name="line.317"></a>
<FONT color="green">318</FONT>                            union = new Union();<a name="line.318"></a>
<FONT color="green">319</FONT>                            union.setLeftArg(constructStatementId((StatementPattern)joinGroup.getMembers().get(0), Integer.toString(0), varNames, bindings) );<a name="line.319"></a>
<FONT color="green">320</FONT>                            Union tmp = union;<a name="line.320"></a>
<FONT color="green">321</FONT>                            int idx;<a name="line.321"></a>
<FONT color="green">322</FONT>                            for (idx=1; idx&lt;joinGroup.getMemberCount()-1; idx++) {<a name="line.322"></a>
<FONT color="green">323</FONT>                                    Union _u = new Union();<a name="line.323"></a>
<FONT color="green">324</FONT>                                    _u.setLeftArg( constructStatementId((StatementPattern)joinGroup.getMembers().get(idx), Integer.toString(idx), varNames, bindings) );<a name="line.324"></a>
<FONT color="green">325</FONT>                                    tmp.setRightArg(_u);<a name="line.325"></a>
<FONT color="green">326</FONT>                                    tmp = _u;<a name="line.326"></a>
<FONT color="green">327</FONT>                            }<a name="line.327"></a>
<FONT color="green">328</FONT>                            tmp.setRightArg( constructStatementId((StatementPattern)joinGroup.getMembers().get(idx), Integer.toString(idx), varNames, bindings));<a name="line.328"></a>
<FONT color="green">329</FONT>                    }               <a name="line.329"></a>
<FONT color="green">330</FONT>                    <a name="line.330"></a>
<FONT color="green">331</FONT>                    ProjectionElemList projList = new ProjectionElemList();<a name="line.331"></a>
<FONT color="green">332</FONT>                    for (String var : varNames)<a name="line.332"></a>
<FONT color="green">333</FONT>                            projList.addElement( new ProjectionElem(var));<a name="line.333"></a>
<FONT color="green">334</FONT>                    <a name="line.334"></a>
<FONT color="green">335</FONT>                    Projection proj = new Projection(union, projList);<a name="line.335"></a>
<FONT color="green">336</FONT>    <a name="line.336"></a>
<FONT color="green">337</FONT>                    return proj;<a name="line.337"></a>
<FONT color="green">338</FONT>            }<a name="line.338"></a>
<FONT color="green">339</FONT>            <a name="line.339"></a>
<FONT color="green">340</FONT>            <a name="line.340"></a>
<FONT color="green">341</FONT>            /**<a name="line.341"></a>
<FONT color="green">342</FONT>             * Construct a select query representing a bound independent join group.<a name="line.342"></a>
<FONT color="green">343</FONT>             * <a name="line.343"></a>
<FONT color="green">344</FONT>             * ?v_%stmt%#%bindingId$<a name="line.344"></a>
<FONT color="green">345</FONT>             * <a name="line.345"></a>
<FONT color="green">346</FONT>             * SELECT ?v_0_0 ?v_0_1 ?v_1_0 ... <a name="line.346"></a>
<FONT color="green">347</FONT>             *      WHERE { <a name="line.347"></a>
<FONT color="green">348</FONT>             *              { ?v_0#0 p o UNION ?v_0_1 p o UNION ... } <a name="line.348"></a>
<FONT color="green">349</FONT>             *              UNION <a name="line.349"></a>
<FONT color="green">350</FONT>             *              { ?v_1_0 p o UNION ?v_1_1 p o UNION ... } <a name="line.350"></a>
<FONT color="green">351</FONT>             *      UNION<a name="line.351"></a>
<FONT color="green">352</FONT>             *      ...<a name="line.352"></a>
<FONT color="green">353</FONT>             *  }<a name="line.353"></a>
<FONT color="green">354</FONT>             * @param joinGroup<a name="line.354"></a>
<FONT color="green">355</FONT>             * @param bindings<a name="line.355"></a>
<FONT color="green">356</FONT>             * @return<a name="line.356"></a>
<FONT color="green">357</FONT>             */<a name="line.357"></a>
<FONT color="green">358</FONT>            public static TupleExpr selectQueryIndependentJoinGroup(IndependentJoinGroup joinGroup, List&lt;BindingSet&gt; bindings) {<a name="line.358"></a>
<FONT color="green">359</FONT>                    <a name="line.359"></a>
<FONT color="green">360</FONT>                    Set&lt;String&gt; varNames = new HashSet&lt;String&gt;();<a name="line.360"></a>
<FONT color="green">361</FONT>                    <a name="line.361"></a>
<FONT color="green">362</FONT>                    <a name="line.362"></a>
<FONT color="green">363</FONT>                    Union outer = null;<a name="line.363"></a>
<FONT color="green">364</FONT>                    <a name="line.364"></a>
<FONT color="green">365</FONT>                    if (joinGroup.getMemberCount()==2) {<a name="line.365"></a>
<FONT color="green">366</FONT>                            outer = new Union();<a name="line.366"></a>
<FONT color="green">367</FONT>                            outer.setLeftArg(constructInnerUnion((StatementPattern)joinGroup.getMembers().get(0), 0, varNames, bindings));<a name="line.367"></a>
<FONT color="green">368</FONT>                            outer.setRightArg(constructInnerUnion((StatementPattern)joinGroup.getMembers().get(1), 1, varNames, bindings));<a name="line.368"></a>
<FONT color="green">369</FONT>                    } else {                        <a name="line.369"></a>
<FONT color="green">370</FONT>                            throw new RuntimeException("TODOO");<a name="line.370"></a>
<FONT color="green">371</FONT>                    }               <a name="line.371"></a>
<FONT color="green">372</FONT>                    <a name="line.372"></a>
<FONT color="green">373</FONT>                    ProjectionElemList projList = new ProjectionElemList();<a name="line.373"></a>
<FONT color="green">374</FONT>                    for (String var : varNames)<a name="line.374"></a>
<FONT color="green">375</FONT>                            projList.addElement( new ProjectionElem(var));<a name="line.375"></a>
<FONT color="green">376</FONT>                    <a name="line.376"></a>
<FONT color="green">377</FONT>                    Projection proj = new Projection(outer, projList);<a name="line.377"></a>
<FONT color="green">378</FONT>    <a name="line.378"></a>
<FONT color="green">379</FONT>                    return proj;<a name="line.379"></a>
<FONT color="green">380</FONT>            }<a name="line.380"></a>
<FONT color="green">381</FONT>            <a name="line.381"></a>
<FONT color="green">382</FONT>            <a name="line.382"></a>
<FONT color="green">383</FONT>            protected static Union constructInnerUnion(StatementPattern stmt, int outerID, Set&lt;String&gt; varNames, List&lt;BindingSet&gt; bindings) {<a name="line.383"></a>
<FONT color="green">384</FONT>                    <a name="line.384"></a>
<FONT color="green">385</FONT>                    Union union = new Union();<a name="line.385"></a>
<FONT color="green">386</FONT>                    union.setLeftArg(constructStatementId(stmt, outerID + "_0", varNames, bindings.get(0)) );<a name="line.386"></a>
<FONT color="green">387</FONT>                    Union tmp = union;<a name="line.387"></a>
<FONT color="green">388</FONT>                    int idx;<a name="line.388"></a>
<FONT color="green">389</FONT>                    for (idx=1; idx&lt;bindings.size()-1; idx++) {<a name="line.389"></a>
<FONT color="green">390</FONT>                            Union _u = new Union();<a name="line.390"></a>
<FONT color="green">391</FONT>                            _u.setLeftArg( constructStatementId(stmt, outerID + "_" + idx, varNames, bindings.get(idx)) );<a name="line.391"></a>
<FONT color="green">392</FONT>                            tmp.setRightArg(_u);<a name="line.392"></a>
<FONT color="green">393</FONT>                            tmp = _u;<a name="line.393"></a>
<FONT color="green">394</FONT>                    }<a name="line.394"></a>
<FONT color="green">395</FONT>                    tmp.setRightArg( constructStatementId(stmt, outerID + "_" + idx, varNames, bindings.get(idx)));<a name="line.395"></a>
<FONT color="green">396</FONT>                    <a name="line.396"></a>
<FONT color="green">397</FONT>                    return union;<a name="line.397"></a>
<FONT color="green">398</FONT>            }<a name="line.398"></a>
<FONT color="green">399</FONT>            <a name="line.399"></a>
<FONT color="green">400</FONT>    <a name="line.400"></a>
<FONT color="green">401</FONT>            /**<a name="line.401"></a>
<FONT color="green">402</FONT>             * Construct the statement string, i.e. "s p o . " with bindings inserted wherever possible. Note that<a name="line.402"></a>
<FONT color="green">403</FONT>             * the free variables are added to the varNames set for further evaluation.<a name="line.403"></a>
<FONT color="green">404</FONT>             * <a name="line.404"></a>
<FONT color="green">405</FONT>             * @param stmt<a name="line.405"></a>
<FONT color="green">406</FONT>             * @param varNames<a name="line.406"></a>
<FONT color="green">407</FONT>             * @param bindings<a name="line.407"></a>
<FONT color="green">408</FONT>             * <a name="line.408"></a>
<FONT color="green">409</FONT>             * @return<a name="line.409"></a>
<FONT color="green">410</FONT>             */<a name="line.410"></a>
<FONT color="green">411</FONT>            protected static StatementPattern constructStatement(StatementPattern stmt, Set&lt;String&gt; varNames, BindingSet bindings) {<a name="line.411"></a>
<FONT color="green">412</FONT>                    <a name="line.412"></a>
<FONT color="green">413</FONT>                    Var subj = appendVar(stmt.getSubjectVar(), varNames, bindings);<a name="line.413"></a>
<FONT color="green">414</FONT>                    Var pred =  appendVar(stmt.getPredicateVar(), varNames, bindings);<a name="line.414"></a>
<FONT color="green">415</FONT>                    Var obj = appendVar(stmt.getObjectVar(), varNames, bindings);<a name="line.415"></a>
<FONT color="green">416</FONT>                    <a name="line.416"></a>
<FONT color="green">417</FONT>                    return new StatementPattern(subj, pred, obj);<a name="line.417"></a>
<FONT color="green">418</FONT>            }<a name="line.418"></a>
<FONT color="green">419</FONT>            <a name="line.419"></a>
<FONT color="green">420</FONT>            /**<a name="line.420"></a>
<FONT color="green">421</FONT>             * Construct the statement string, i.e. "s p o . " with bindings inserted wherever possible. Variables<a name="line.421"></a>
<FONT color="green">422</FONT>             * are renamed to "var_"+varId to identify query results in bound queries. Note that<a name="line.422"></a>
<FONT color="green">423</FONT>             * the free variables are also added to the varNames set for further evaluation.<a name="line.423"></a>
<FONT color="green">424</FONT>             * <a name="line.424"></a>
<FONT color="green">425</FONT>             * @param stmt<a name="line.425"></a>
<FONT color="green">426</FONT>             * @param varNames<a name="line.426"></a>
<FONT color="green">427</FONT>             * @param bindings<a name="line.427"></a>
<FONT color="green">428</FONT>             * <a name="line.428"></a>
<FONT color="green">429</FONT>             * @return<a name="line.429"></a>
<FONT color="green">430</FONT>             */<a name="line.430"></a>
<FONT color="green">431</FONT>            protected static StatementPattern constructStatementId(StatementPattern stmt, String varID, Set&lt;String&gt; varNames, BindingSet bindings) {<a name="line.431"></a>
<FONT color="green">432</FONT>                    <a name="line.432"></a>
<FONT color="green">433</FONT>                    <a name="line.433"></a>
<FONT color="green">434</FONT>                    Var subj = appendVarId(stmt.getSubjectVar(), varID, varNames, bindings);<a name="line.434"></a>
<FONT color="green">435</FONT>                    Var pred =  appendVarId(stmt.getPredicateVar(), varID, varNames, bindings);<a name="line.435"></a>
<FONT color="green">436</FONT>                    Var obj = appendVarId(stmt.getObjectVar(), varID, varNames, bindings);<a name="line.436"></a>
<FONT color="green">437</FONT>                    <a name="line.437"></a>
<FONT color="green">438</FONT>                    return new StatementPattern(subj, pred, obj);<a name="line.438"></a>
<FONT color="green">439</FONT>            }<a name="line.439"></a>
<FONT color="green">440</FONT>            <a name="line.440"></a>
<FONT color="green">441</FONT>            /**<a name="line.441"></a>
<FONT color="green">442</FONT>             * Construct the statement string, i.e. "s p ?o_varID FILTER ?o_N=o ". This kind of statement<a name="line.442"></a>
<FONT color="green">443</FONT>             * pattern is necessary to later on identify available results.<a name="line.443"></a>
<FONT color="green">444</FONT>             * <a name="line.444"></a>
<FONT color="green">445</FONT>             * @param stmt<a name="line.445"></a>
<FONT color="green">446</FONT>             * @param varID<a name="line.446"></a>
<FONT color="green">447</FONT>             * @param varNames<a name="line.447"></a>
<FONT color="green">448</FONT>             * @param bindings<a name="line.448"></a>
<FONT color="green">449</FONT>             * @return<a name="line.449"></a>
<FONT color="green">450</FONT>             */<a name="line.450"></a>
<FONT color="green">451</FONT>            protected static TupleExpr constructStatementCheckId(StatementPattern stmt, int varID, Set&lt;String&gt; varNames, BindingSet bindings) {<a name="line.451"></a>
<FONT color="green">452</FONT>                    <a name="line.452"></a>
<FONT color="green">453</FONT>                    String _varID = Integer.toString(varID);<a name="line.453"></a>
<FONT color="green">454</FONT>                    Var subj = appendVarId(stmt.getSubjectVar(), _varID, varNames, bindings);<a name="line.454"></a>
<FONT color="green">455</FONT>                    Var pred = appendVarId(stmt.getPredicateVar(), _varID, varNames, bindings);<a name="line.455"></a>
<FONT color="green">456</FONT>                    <a name="line.456"></a>
<FONT color="green">457</FONT>                    Var obj = new Var("o_" + _varID);<a name="line.457"></a>
<FONT color="green">458</FONT>                    varNames.add("o_" + _varID);<a name="line.458"></a>
<FONT color="green">459</FONT>                                    <a name="line.459"></a>
<FONT color="green">460</FONT>                    Value objValue;<a name="line.460"></a>
<FONT color="green">461</FONT>                    if (stmt.getObjectVar().hasValue()) {<a name="line.461"></a>
<FONT color="green">462</FONT>                            objValue = stmt.getObjectVar().getValue();<a name="line.462"></a>
<FONT color="green">463</FONT>                    } else if (bindings.hasBinding(stmt.getObjectVar().getName())){<a name="line.463"></a>
<FONT color="green">464</FONT>                            objValue = bindings.getBinding(stmt.getObjectVar().getName()).getValue();<a name="line.464"></a>
<FONT color="green">465</FONT>                    } else {<a name="line.465"></a>
<FONT color="green">466</FONT>                            // just to make sure that we see an error, will be deleted soon<a name="line.466"></a>
<FONT color="green">467</FONT>                            throw new RuntimeException("Unexpected.");<a name="line.467"></a>
<FONT color="green">468</FONT>                    }<a name="line.468"></a>
<FONT color="green">469</FONT>                    <a name="line.469"></a>
<FONT color="green">470</FONT>                    Compare cmp = new Compare(obj, new ValueConstant(objValue));<a name="line.470"></a>
<FONT color="green">471</FONT>                    cmp.setOperator(CompareOp.EQ);<a name="line.471"></a>
<FONT color="green">472</FONT>                    Filter filter = new Filter( new StatementPattern(subj, pred, obj), cmp);<a name="line.472"></a>
<FONT color="green">473</FONT>                                    <a name="line.473"></a>
<FONT color="green">474</FONT>                    return filter;<a name="line.474"></a>
<FONT color="green">475</FONT>            }<a name="line.475"></a>
<FONT color="green">476</FONT>            <a name="line.476"></a>
<FONT color="green">477</FONT>            <a name="line.477"></a>
<FONT color="green">478</FONT>            <a name="line.478"></a>
<FONT color="green">479</FONT>            <a name="line.479"></a>
<FONT color="green">480</FONT>            /**<a name="line.480"></a>
<FONT color="green">481</FONT>             * Clone the specified variable and attach bindings.<a name="line.481"></a>
<FONT color="green">482</FONT>             *  <a name="line.482"></a>
<FONT color="green">483</FONT>             * @param sb<a name="line.483"></a>
<FONT color="green">484</FONT>             * @param var<a name="line.484"></a>
<FONT color="green">485</FONT>             * @param varNames<a name="line.485"></a>
<FONT color="green">486</FONT>             * @param bindings<a name="line.486"></a>
<FONT color="green">487</FONT>             * <a name="line.487"></a>
<FONT color="green">488</FONT>             * @return<a name="line.488"></a>
<FONT color="green">489</FONT>    <a name="line.489"></a>
<FONT color="green">490</FONT>             */<a name="line.490"></a>
<FONT color="green">491</FONT>            protected static Var appendVar(Var var, Set&lt;String&gt; varNames, BindingSet bindings) {<a name="line.491"></a>
<FONT color="green">492</FONT>                    Var res = var.clone();<a name="line.492"></a>
<FONT color="green">493</FONT>                    if (!var.hasValue()) {<a name="line.493"></a>
<FONT color="green">494</FONT>                            if (bindings.hasBinding(var.getName()))<a name="line.494"></a>
<FONT color="green">495</FONT>                                    res.setValue( bindings.getValue(var.getName()) );<a name="line.495"></a>
<FONT color="green">496</FONT>                            else <a name="line.496"></a>
<FONT color="green">497</FONT>                                    varNames.add(var.getName());                    <a name="line.497"></a>
<FONT color="green">498</FONT>                    }<a name="line.498"></a>
<FONT color="green">499</FONT>                    return res;<a name="line.499"></a>
<FONT color="green">500</FONT>            }<a name="line.500"></a>
<FONT color="green">501</FONT>            <a name="line.501"></a>
<FONT color="green">502</FONT>            /**<a name="line.502"></a>
<FONT color="green">503</FONT>             * Clone the specified variable and attach bindings, moreover change name of variable<a name="line.503"></a>
<FONT color="green">504</FONT>             * by appending "_varId" to it.<a name="line.504"></a>
<FONT color="green">505</FONT>             * <a name="line.505"></a>
<FONT color="green">506</FONT>             * @param sb<a name="line.506"></a>
<FONT color="green">507</FONT>             * @param var<a name="line.507"></a>
<FONT color="green">508</FONT>             * @param varNames<a name="line.508"></a>
<FONT color="green">509</FONT>             * @param bindings<a name="line.509"></a>
<FONT color="green">510</FONT>             * <a name="line.510"></a>
<FONT color="green">511</FONT>             * @return<a name="line.511"></a>
<FONT color="green">512</FONT>             */<a name="line.512"></a>
<FONT color="green">513</FONT>            protected static Var appendVarId(Var var, String varID, Set&lt;String&gt; varNames, BindingSet bindings) {<a name="line.513"></a>
<FONT color="green">514</FONT>                    Var res = var.clone();<a name="line.514"></a>
<FONT color="green">515</FONT>                    if (!var.hasValue()) {<a name="line.515"></a>
<FONT color="green">516</FONT>                            if (bindings.hasBinding(var.getName())) {<a name="line.516"></a>
<FONT color="green">517</FONT>                                    res.setValue( bindings.getValue(var.getName()) );<a name="line.517"></a>
<FONT color="green">518</FONT>                            } else {<a name="line.518"></a>
<FONT color="green">519</FONT>                                    String newName = var.getName() + "_" + varID;<a name="line.519"></a>
<FONT color="green">520</FONT>                                    varNames.add(newName);<a name="line.520"></a>
<FONT color="green">521</FONT>                                    res.setName(newName);<a name="line.521"></a>
<FONT color="green">522</FONT>                            }                       <a name="line.522"></a>
<FONT color="green">523</FONT>                    }<a name="line.523"></a>
<FONT color="green">524</FONT>                    return res;<a name="line.524"></a>
<FONT color="green">525</FONT>            }<a name="line.525"></a>
<FONT color="green">526</FONT>                    <a name="line.526"></a>
<FONT color="green">527</FONT>            <a name="line.527"></a>
<FONT color="green">528</FONT>            <a name="line.528"></a>
<FONT color="green">529</FONT>    }<a name="line.529"></a>




























































</PRE>
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